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BQ27Z855

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Batterieanzeige mit integr. linearem Ladegerät, Schutz und Auth. für 1-reihige Zellenpacks

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Benutzerhandbücher

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BQ27Z855 Technical Reference Manual (Rev. A) (Englisch)

BQ27Z855

AKTIV

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Produktdetails

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Fully integrated battery fuel gauge, linear battery charger, protector, and authenticator
Battery chemistries supported include Li-ion with LCO, NMC, or LFP cathodes
Battery fuel gauging based on patented Dynamic Z-Track technology
- Automatically adjusts for aging, temperature, and rate-induced effects on the battery
Fully featured battery linear charger
- CC/CV charging up to 2A with JEITA-compliant integrated Advanced Charge Algorithm (ACA)
- Dynamic Power Path Management
  - MINSYS mode to ensure system voltage does not drop below target threshold while charging with a weak input
  - SUPPLEMENT mode with ultra fast switching time to ensure system does not brown out during loads while charging
- Ideal diode (ID) mode during discharge to prevent voltage drop to system load
- PACK+ terminal voltage tolerance of +24V with 1kΩ RPACK value
High-accuracy analog front end with two independent ADCs:
- 18-bit low offset delta-sigma ADC for Coulomb counting with ±100mV input range
- 16-bit delta-sigma ADC for cell voltage and internal and external temperature sensors
Programmable safety and protection:
- Hardware-level protections
  - Over Voltage Protection (OVP)
  - Under Voltage Protection (UVP)
  - Over Current Charging (OCC)
  - Over Current Discharging (OCD)
  - Short Circuit Discharging (SCD)
- Firmware-level protections
  - OVP, UVP, OCC, and OCD
  - Under Temperature (UT)
  - Over Temperature (OT)
  - FET Failure (FETF)
  - Charge Timeout (CTO)
ECC ECDSA authentication support with secure memory
True zero-volt charging to support dead battery charging
Integrated RTC with calendar and time of day
Ultra-compact, 15-ball DSBGA package (YAH)

Fully integrated battery fuel gauge, linear battery charger, protector, and authenticator
Battery chemistries supported include Li-ion with LCO, NMC, or LFP cathodes
Battery fuel gauging based on patented Dynamic Z-Track technology
- Automatically adjusts for aging, temperature, and rate-induced effects on the battery
Fully featured battery linear charger
- CC/CV charging up to 2A with JEITA-compliant integrated Advanced Charge Algorithm (ACA)
- Dynamic Power Path Management
  - MINSYS mode to ensure system voltage does not drop below target threshold while charging with a weak input
  - SUPPLEMENT mode with ultra fast switching time to ensure system does not brown out during loads while charging
- Ideal diode (ID) mode during discharge to prevent voltage drop to system load
- PACK+ terminal voltage tolerance of +24V with 1kΩ RPACK value
High-accuracy analog front end with two independent ADCs:
- 18-bit low offset delta-sigma ADC for Coulomb counting with ±100mV input range
- 16-bit delta-sigma ADC for cell voltage and internal and external temperature sensors
Programmable safety and protection:
- Hardware-level protections
  - Over Voltage Protection (OVP)
  - Under Voltage Protection (UVP)
  - Over Current Charging (OCC)
  - Over Current Discharging (OCD)
  - Short Circuit Discharging (SCD)
- Firmware-level protections
  - OVP, UVP, OCC, and OCD
  - Under Temperature (UT)
  - Over Temperature (OT)
  - FET Failure (FETF)
  - Charge Timeout (CTO)
ECC ECDSA authentication support with secure memory
True zero-volt charging to support dead battery charging
Integrated RTC with calendar and time of day
Ultra-compact, 15-ball DSBGA package (YAH)

The Texas Instruments BQ27Z855 Dynamic Z-Trackgas gauge solution is a fully integrated, accurate 1-series cell gas gauge, JEITA-compliant linear battery charger, protection, and authentication solution.

The BQ27Z855 gas gauge communicates through an I2C compatible interface and combines an ultra-low power ARM M0 RISC processor, high accuracy analog measurement capabilities, integrated flash memory, high-side NMOS FET drivers, and ECC ECDSA authentication to provide a complete, high-performance battery management solution.

The Texas Instruments BQ27Z855 Dynamic Z-Trackgas gauge solution is a fully integrated, accurate 1-series cell gas gauge, JEITA-compliant linear battery charger, protection, and authentication solution.

The BQ27Z855 gas gauge communicates through an I2C compatible interface and combines an ultra-low power ARM M0 RISC processor, high accuracy analog measurement capabilities, integrated flash memory, high-side NMOS FET drivers, and ECC ECDSA authentication to provide a complete, high-performance battery management solution.

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Top-Dokumentation	Typ	Titel	Format-Optionen	Datum
*	Benutzerhandbuch	BQ27Z855 Technical Reference Manual (Rev. A)	PDF \| HTML	21.07.2026
	Anwendungshinweis	Dynamic Z-Track™ Technology: An Advanced Battery Gauging Algorithm for Dynamic Load Applications (Rev. A)	PDF \| HTML	15.07.2025
	Anwendungshinweis	Implementation of Elliptic Curve Cryptography Authentication on TI Battery Fuel Gauges	PDF \| HTML	28.05.2025
	Anwendungshinweis	How to Create and Program Authentication Keys into TI Battery Fuel Gauges	PDF \| HTML	05.03.2025
	Anwendungshinweis	Battery Gauging Algorithm Comparison	PDF \| HTML	04.12.2023

BQ27Z855

Batterieanzeige mit integr. linearem Ladegerät, Schutz und Auth. für 1-reihige Zellenpacks

BQ27Z855

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